[1] Natl Spine & Pain Ctr, Shrewsbury, NJ USA
[2] Univ Glasgow, MRC CSO Social & Publ Hlth Sci Unit, Glasgow, Scotland
[3] Univ Glasgow, Inst Hlth & Well Being, Robertson Ctr Biostat, Glasgow, Scotland
[4] Harvard Med Sch, Brigham & Womens Hosp, Div Pain Med, Boston, MA USA
[5] Sutter Hlth Syst, Roseville, CA USA
[6] Spine & Pain Inst New York, New York, NY USA
[7] NYU, Langone Med Ctr, Dept Anesthesiol, New York, NY USA
[8] Saluda Med Pty Ltd, Artarmon, NSW, Australia
[9] Univ Liverpool, Dept Hlth Data Sci, Liverpool Reviews & Implementat Grp, Liverpool, England
[10] James Cook Univ Hosp, Dept Pain Med, Middlesbrough, England
[11] James Cook Univ Hosp, Dept Pain & Anaesthesia, Murray Bldg,Marton Rd, Middlesbrough TS4 3BW, England